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Thread: cant get stock tune off truck

  1. #1
    Junior Member browneflatwork's Avatar
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    Default cant get stock tune off truck

    i am trying to tune a 05 lly, it keeps telling me bootloader rejected check cables no communication from ecm.....it starts to read and wont go past getting status........i tried to pull radio fuse info fuse all other aftermarket electronics area removed have just got a new lisense and updated my efi what eles could it be????? thanks
    EFI....SC IV,fass 150,sleeves, MBRP 4in TB,afe intake, shimmed rail, blocked egr,auto meter c2 gauges, home built trac bars,

  2. #2
    Junior Member browneflatwork's Avatar
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    i also unchecked the high speed and tried using alt keys, still would not work
    EFI....SC IV,fass 150,sleeves, MBRP 4in TB,afe intake, shimmed rail, blocked egr,auto meter c2 gauges, home built trac bars,

  3. #3
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    Check for a blown cigarette lighter/power port fuse because it also powers the OBD port and if it's dead a scanner can't communicate.

    That one has gotten me a couple times on the GM trucks.

  4. #4
    Junior Member browneflatwork's Avatar
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    I checked aux fuses and all other cig fuses they are good, the conection to my laptop is fine scanner comes on, and also when I plug just into the truck it will come on,
    EFI....SC IV,fass 150,sleeves, MBRP 4in TB,afe intake, shimmed rail, blocked egr,auto meter c2 gauges, home built trac bars,

  5. #5
    Joe (Moderator) joecar's Avatar
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    Hi browneflatwork,

    Can you copy/paste the text that shows up during your attempt into this thread...

    Thanks,
    Joe

  6. #6
    Lifetime Member mr.prick's Avatar
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    Is the scan tool connected while using the tune tool to read/write to the PCM?
    It should not be.
    512k RoadRunner Firmware 12.14R
    FlashScan V2 Bootblock V2.07.04 Firmware V2.07.22 EFILive V7.5.7 (Build 191) V8.2.1 (Build 181)
    LC-1 WBO2

    _________________________________________________

  7. #7
    Junior Member browneflatwork's Avatar
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    the text says......Connection to ecm has been lost please check all cabels and conections
    EFI....SC IV,fass 150,sleeves, MBRP 4in TB,afe intake, shimmed rail, blocked egr,auto meter c2 gauges, home built trac bars,

  8. #8
    Junior Member browneflatwork's Avatar
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    i switched usb ports on my computer than got a Bootloader rejected :Reason no response from ECM
    EFI....SC IV,fass 150,sleeves, MBRP 4in TB,afe intake, shimmed rail, blocked egr,auto meter c2 gauges, home built trac bars,

  9. #9
    Joe (Moderator) joecar's Avatar
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    Are you selecting the correct Controller...?

    I pm'd Tech Support.

  10. #10
    Junior Member browneflatwork's Avatar
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    lly ecm.....truck is an o5 8th digit of vin is 2.........i also have a 05 lly and it tunes reads just fine no problems.....this truck aftermarket radio i pulled both radio fuses tried with and without info fuse in still nothing
    EFI....SC IV,fass 150,sleeves, MBRP 4in TB,afe intake, shimmed rail, blocked egr,auto meter c2 gauges, home built trac bars,

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